very quick question lads

[jeffchiz]

basically ive done a search but cant find the exact info i need basically i have a mk1 vtr and i know that later mk2 silvertop vtrs have an extra 10bhp, but what i want to know is why are they different what is actually different? i know all the differences in the exhausts etc so does that make any difference where the cat is? and a bit off subject but my mate stealth106 said that if i got a mk1 106 xsi 1.6 8v ecu then that will make my power go up to 100bhp? but surely that must be hard to connect an ecu from a different car cus that'll cause loads off problems eg the immobiliser? anyway any advise plz guys

[Quick]

http://www.saxperience.com/forum/showthread.php?t=87916

Nope, just swopping the ecu won't give you 10bhp.

[jeffchiz]

http://www.saxperience.com/forum/showthread.php?t=87916

Nope, just swopping the ecu won't give you 10bhp.

its a good page but like i say it doesnt actually say why one is more powerful than the other......

[jeffchiz]

ive just read through the 5 pages but i just want in black and white in bullet points whats the difference between a 90bhp silver top and a 98 bhp silver top grrrrrr this is annoying no one seams to know i think im just gonna PM kamracing

[vts-luke]

as far as i know the differences are the exhaust (cat placement) and the ecu map

[jeffchiz]

as far as i know the differences are the exhaust (cat placement) and the ecu map

cheers mate im having the supersprint middle section made for the mk 2 on my mk1 so it decats it which then the only difference between mine and a late silver top is the ecu map?

[titchster]

Inlets look different, but whether they actually are inside I don't know.
Cat's under the car on Mk1s
ECU map??
Mk1's have HT leads (would this affect power in any way?)

[jeffchiz]

Inlets look different, but whether they actually are inside I don't know.
Cat's under the car on Mk1s
ECU map??
Mk1's have HT leads (would this affect power in any way?)

wat do mk2's have then if they dont have ht leads :S and some mk2's come with cats under the car if u go ont hat link the engine arent quite as simple as 90bhp mk1's and 100bhp mk2's mk1's had two engines and mk2 had two engines and the engine ive got is the early silver top which overlapped the two oh well i think i'll give up and just b happy with my engine and not question why its slower than the later vtrs lol its not like im gonna go to the extent of fitting a later vtr engine cus ill just fit a vts engine...
cheers for ur help anyway lads, if anyone else has some info let me know
caio xx

[LeeM]

its got differences in the head, its basically a more modern and efficient engine which results in more power

[ChrisRitchVTR]

the later mk1s and all mk2s have coil packs instead of ht leads

[jeffchiz]

the later mk1s and all mk2s have coil packs instead of ht leads

oh right i seee lol yea i must have a coilpack then

[blackie_2k5]

you will, yours should be silvertop, black top = ht leads

[jeffchiz]

its got differences in the head, its basically a more modern and efficient engine which results in more power

cheers for your help i was gonna see if i can convert my engine if it was something simple and bolt on but it seams alot of hard work for not alot of extra power

[jeffchiz]

you will, yours should be silvertop, black top = ht leads

yea :y:

[blackie_2k5]

converting is daft mate for 8bhp, then main diff is said to be in the inlet mani, you can mod your car to gain 8hp easily with out having to change, theres meant to be very little in real life anyway when comparing the 2, plus you can upgrade your mani to a 106 s1 rallye mani, aluminium and alot bigget, the 98bhp cant as it has different port spacings

[jeffchiz]

converting is daft mate for 8bhp, then main diff is said to be in the inlet mani, you can mod your car to gain 8hp easily with out having to change, theres meant to be very little in real life anyway when comparing the 2, plus you can upgrade your mani to a 106 s1 rallye mani, aluminium and alot bigget, the 98bhp cant as it has different port spacings

oh right cool thanks for the info mate how much gain is there to be had in changing to the s1 rallye inlet mani?

[blackie_2k5]

on paper i do not know, from experience with fitting to my vtr it had a noticable improvement on low down power, then i fitted cams which idled perfect from fitting the mani(ph3) and with a remap the gains are meant to be much better with or withou cams(i never got to remap)

[jeffchiz]

on paper i do not know, from experience with fitting to my vtr it had a noticable improvement on low down power, then i fitted cams which idled perfect from fitting the mani(ph3) and with a remap the gains are meant to be much better with or withou cams(i never got to remap)

im always worried about moddifying my vtr engine tho, i just went on kam racing website and for a cheap(ish) raceland 4-2-1 manifold, supersprint race exhaust, a katcam fast road cam and all that alone came to nearly £700! and i had a quick look on ebay for a s1 rallye mani but there werent any on there but for about £300-£350 i could just do a vts conversion and id have and extra 30bhp straight away i need to make my mind up i think about which route 8v or 16v hmmmmm... the never ending argument.... lol

[blackie_2k5]

id go vts its a better base to start modding but its your choice

[Mochachino]

Mk1s have single plug magnetti marelli ECUs where as the mk2s have bochse ECU. The bosche ones are slightly more sophisticated, they have a map which adjusts rather than the mk1 which does exactly the same no matter what the tempreture conditions are like at start up etc.

[jeffchiz]

Mk1s have single plug magnetti marelli ECUs where as the mk2s have bochse ECU. The bosche ones are slightly more sophisticated, they have a map which adjusts rather than the mk1 which does exactly the same no matter what the tempreture conditions are like at start up etc.

when u say mk1's dose that include the black top as well as early silvertop? im guessing thats wat you mean, citroen do like to make things difficult and not black and white lol and yea cheers for your input :y:

[jeffchiz]

also im not gonna bother asking if i can fit the later ecu to my car im just not even gonna go there lol i can see the problems multiplying franticly in front of me haha

[Mochachino]

when u say mk1's dose that include the black top as well as early silvertop? im guessing thats wat you mean, citroen do like to make things difficult and not black and white lol and yea cheers for your input :y:

Yeh, but then the blacktops are different to the single plug grey rover cover engines lol

also im not gonna bother asking if i can fit the later ecu to my car im just not even gonna go there lol i can see the problems multiplying franticly in front of me haha

Good dont ask, couse it isnt as simple as plugging in anyway lol.

[DaN90]

16v mate im planning it. U can cam vtr etc to get 120bhp or why not 16v for half price then cam etc and have alot more powaaaaa!

[jeffchiz]

16v mate im planning it. U can cam vtr etc to get 120bhp or why not 16v for half price then cam etc and have alot more powaaaaa!

exactly my thinking ill be very happy with a standard vts engine for the time being, gradually over the year and half ive been driving ive had slightly more powerful cars each time and i think im ready for a vts engine i started out with a 59 bhp fiesta where i think everyone should start lol